Perhaps you should try some spelling variations:
khoan phai » khong phai, khoa phau, khoan hoi
phai thong » phap thong, phai tuong, phan thong
cach khoan » cach hoan, bach khoa, coc khoan
khoan phap » khoa phau, han phap, khong phap
sach tri » sach tai, sach tren, sach truc
tu sach » thu sach, su sach, te sach
tu cach » tu cac
nha ve » nhat ve, nhan ve, nha va
ve cac » va cac, vien cac
tri tu » tri tue, troi tu, tai tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu sach nha ve cac khoan phai thong ) or ( tu sach tri tu cach khoan phap tieng ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach nha ve cac khoan phai thong ) OR ( tu sach tri tu cach khoan phap tieng )).
• Adding a wildcard symbol may retrieve word variants: (( tu sach nha ve cac khoan phai thong ) or ( tu sach tri tu cach khoan phap tieng ))*.